| 发明名称 | Antenna array calibration using traffic signals | ||
| 摘要 | An antenna array of a base station is calibrated using outbound traffic signals. The antenna array includes a number of sub-arrays. A combiner in the antenna array combines the outbound traffic signals in the sub-arrays into a feedback signal. The outbound traffic signals are captured simultaneously for use as reference signals before the outbound traffic signals enter transmit paths in a radio unit of the base station. Each of the reference signals is one of the outbound traffic signals that is to be transmitted via one of the sub-arrays. An impairment estimator of the base station estimates the impairment for each of the outbound traffic signals based on the feedback signal and the reference signals. An approximate inverse of the impairment estimation is applied to the outbound traffic signals by a number of equalizers before the outbound traffic signals enter the transmit paths. | ||
| 申请公布号 | US9025575(B2) | 申请公布日期 | 2015.05.05 |
| 申请号 | US201213677781 | 申请日期 | 2012.11.15 |
| 申请人 | Telefonaktiebolaget LM Ericsson (Publ) | 发明人 | McGowan Neil;Da Silveira Marthinus Willem;Ho Tan |
| 分类号 | H04W72/04;H04W72/08;H04L25/03;H04B7/06 | 主分类号 | H04W72/04 |
| 代理机构 | Nicholson De Vos Webster & Elliott, LLP | 代理人 | Nicholson De Vos Webster & Elliott, LLP |
| 主权项 | 1. A method for calibrating an antenna array of a base station to remove distortion incurred by transmit paths in a base station, the antenna array including a plurality of sub-arrays coupled to the transmit paths for transmitting outbound traffic signals to a wireless network, the method comprising the steps of: combining the outbound traffic signals in respective ones of the sub-arrays into a feedback signal by a combiner in the antenna array; capturing the outbound traffic signals simultaneously for use as reference signals before the outbound traffic signals enter the transmit paths, each of the reference signals being one of the outbound traffic signals that is to be transmitted via one of the sub-arrays; performing an impairment estimation for each of the outbound traffic signals based on the feedback signal and the reference signals; and applying equalizer taps with values representing an approximate inverse of the impairment estimation to each of the outbound traffic signals before the outbound traffic signals enter the transmit paths to thereby remove the distortion incurred by the transmit paths. | ||
| 地址 | Stockholm SE | ||